You still can take a tax break for installing energy-efficient windows, but you need to act quickly: The windows must be installed by December 31, 2007, to qualify for the credit.

You can get tax breaks for a variety of home improvements. You can take a tax credit for 10% of the cost, up to $500, for installing energy-efficient windows, doors, skylights, insulation and a metal roof coated with heat-reducing pigments (only $200 of the credit can be for replacement windows). You can receive a credit for installing certain efficient hot water heaters and central air conditioning systems, too.